Hach DR/2000 Instruction Sheet

DR/2000 and DR/2010 Spectrophotometer
Lamp Replacement
Purpose
These instructions provide a step-by-step procedure for replacing the lamp in DR/2000 and
DR/2010 Spectrophotometers. Remember, a wavelength calibration adjustment must be done
after replacing the lamp. See the Wavelength Calibration Adjustment instructions shipped with
the lamp.
The lamp shipped with this instruction sheet is one of two designs. One lamp has a single square
slot and a light slit (see Figure 1). The other lamp has a v-shaped slot and a square slot (see
Figure 2). Instructions for installing each lamp are slightly different in step 4.
Lamp Replacement
If the lamp fails and must be replaced, proceed as follows.
1. Disconnect the Battery Eliminator and the RS 232 connector. Turn off the power switch and
2. Remove the two screws securing the lamp compartment cover and remove the cover (see
3. Remove the lamp retainer screw and metal sleeve from the lamp channel. The sleeve is
4. To replace a lamp with two notches (Figure 1), place the new lamp in the lamp channel with
5. Push the lamp to the bottom of the lamp channel and install. Firmly tighten the lamp retainer
6. Install the lamp compartment cover. Return the instrument to the upright position and
Note: Some internal components are sensitive to static and may be damaged by external static electricity.
7. Perform the Lamp Calibration Adjustment procedure described in the instruction shipped
All manuals and user guides at all-guides.com
empty the cell holder. Place the instrument upside down on a padded surface.
Figure 1).
tapered at the bottom end, and, because of its snug fit, probably needs to be loosened with a
tool (needle-nose pliers are recommended) for removal. Remove the lamp. Loosen the two
terminal screws to free the lamp leads.
the light slit toward the light slit in the channel.
To replace a lamp with a single notch (Figure 2), place the new lamp in the lamp channel
with the V-shaped groove facing the wavelength dial. The square notch in the new lamp
should be placed against the side with the retainer screw.
screw and sleeve in the channel to secure the lamp. Secure the sleeve with the beveled end
down. The lamp must be held tightly in the proper position, flush against the bottom, the
end, and the light slit side of the lamp channel (see Figure 2). Connect the lamp leads of the
new lamp assembly at the lamp terminals (lead orientation does not matter).
Do not overtighten.
restore power.
Always re-install the lamp cover after maintenance or servicing.
with the lamp.
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